【摘要】 为评估牧草、绿肥兼用草种闽南饲用(印度)豇豆(Vigna unguiculata)作为载体植物扩繁豆蚜(Aphis craccivora)的适合性,开展了不同温度下闽南饲用(印度)豇豆对豆蚜存活率、发育历期、繁殖力影响的研究,并构建了种群生命表。结果表明:在17～33℃,豆蚜的世代发育历期随温度的升高而缩短;21℃时豆蚜的产蚜量最高,为103.90只;净增殖率随温度升高而降低,33℃时最低(1.378),17℃最高(54.649);在17～33℃,内禀增长率在25℃时最大(0.338),33℃时最小(0.041);周限增长率在25℃时最高(1.403),33℃时最低(1.042);种群加倍时间在25℃时最低,为2.049 d。闽南饲用(印度)豇豆具备载体植物的潜力,对建立以闽南饲用(印度)豇豆为纽带的载体植物系统有一定的启发。更多还原

【Abstract】 The developmental duration, fecundity, and life table of Aphis craccivora at different constant temperatures were studied to verify whether Vigna unguiculata ’Minnan’ is a suitable host plant for A. craccivora. The results showed that the developmental duration of A. craccivora decreased with increase of temperature from 17 ℃ to 33 ℃. The fecundity of A.craccivora was significantly different at temperatures from 17～33 ℃, being highest at 21 ℃(103.90) and lowest at 33 ℃(4.40). The net reproductive rate decreased with the increase of temperature, being lowest at 33 ℃(1.378) and highest at 21 ℃(54.649). The intrinsic increase rate was above zero at 17～33 ℃, lowest at 33 ℃(0.041) and highest at 25 ℃(0.338). The finite rate of increase varied with temperature increase, being highest at 25 ℃(1.403) and lowest at 33 ℃(1.042). The time for population doubling was lowest at 25 ℃(2.049 d). The results indicated that V. unguiculata ’Minnan’ can be used as a banker plant for producing A. craccivora, supplying enough food for natural enemies, for example ladybugs or parasitic wasps, in ecosystems.更多还原